61bf6b0f58
Currently displayed alongside the QPainter version, while establishing the accuracy of each mode, but this is temporary.
71 lines
1.9 KiB
C++
71 lines
1.9 KiB
C++
//
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// Copyright (C) 2017 James Turner zakalawe@mac.com
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of the GNU General Public License as
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// published by the Free Software Foundation; either version 2 of the
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// License, or (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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#include "fgcanvaswidget.h"
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#include <QDebug>
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#include <QPainter>
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#include "localprop.h"
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#include "fgcanvasgroup.h"
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#include "fgcanvaspaintcontext.h"
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FGCanvasWidget::FGCanvasWidget(QWidget *parent) :
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QWidget(parent)
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{
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}
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void FGCanvasWidget::setRootProperty(LocalProp* root)
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{
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_canvasRoot = root;
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_rootElement = new FGCanvasGroup(nullptr, root);
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update();
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}
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FGCanvasGroup *FGCanvasWidget::rootElement()
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{
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return _rootElement;
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}
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void FGCanvasWidget::paintEvent(QPaintEvent *pe)
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{
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if (!_rootElement) {
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return;
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}
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QPainter painter(this);
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painter.fillRect(rect(), Qt::black);
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painter.setRenderHint(QPainter::Antialiasing, true);
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QSizeF sz(_canvasRoot->value("size[0]", 512).toInt(),
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_canvasRoot->value("size[1]", 512).toInt());
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// set scaling by canvas size
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const double verticalScaling = height() / sz.height();
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const double horizontalScaling = width() / sz.width();
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const double usedScale = std::min(verticalScaling, horizontalScaling);
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painter.scale(usedScale, usedScale);
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// captures the view scaling
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FGCanvasPaintContext context(&painter);
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_rootElement->paint(&context);
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}
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